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SN54ALS244B Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN54ALS244B
Description  OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS244B, SN54AS244, SN74ALS244B, SN74AS244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
© 1987, Texas Instruments Incorporated
1
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
PNP inputs Reduce DC Loading
Package Options include Plastic Small
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
Dependable Texas instruments Quality and
Reliability
description
These octal buffers and line drivers are designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and transmit-
ters.
Taken
together
with
the
’ALS240A,
’ALS241A, ’AS240, and ’AS241, these devices
provide the choice of selected combinations of
inverting outputs, symmetrical G (active-low input
control) inputs, and complementary G and G
inputs.
The –1 version of the SN74ALS244B is identical
to
the
standard
version
except
that
the
recommended maximum IOL is increased to
48
mA.
There
is
no
–1
version
of
the
SN54ALS244B.
The SN54ALS244B and SN54AS244 are characterized for operation over the full military temperature range
of – 55
°C to 125°C. The SN74ALS244B and SN74AS244 are characterized for operation from 0°C to 70°C.
logic symbol
19
11
13
15
17
2G
2A1
2A2
2A3
2A4
9
7
5
3
2Y1
2Y2
2Y3
2Y4
EN
EN
1Y4
1Y3
1Y2
1Y1
12
14
16
18
1A4
1A3
1A2
1A1
1G
8
6
4
2
1
†This is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
1Y4
1Y3
1Y2
1Y1
12
14
16
18
1A4
1A3
1A2
1A1
1G
8
6
4
2
1
2A4
2A3
2A2
2A1
2G
17
15
13
11
19
1Y4
1Y3
1Y2
1Y1
3
5
7
9
Pin numbers are for DW, J, and N packages.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SN54ALS244B, SN54AS244 ...J PACKAGE
SN74ALS244B, SN74AS244 . . . DW OR N PACKAGE
(TOP VIEW)
SN54ALS244B, SN54AS244 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
VCC
2G
1Y1
A24
1Y2
2A3
1Y3
2A2
1Y4
2A1
3
2
1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4




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